Valve assembly for glassware forming machine

A valve assembly for controlling the application of vacuum and counterblow air to a blank mould of a glassware forming machine, said assembly comprising first normally closed pilot open valve means for controlling the application of vacuum to the blank mould, second normally closed pilot open valve means for controlling the flow of counterblow air to the blank mould, and third normally open pilot closed valve means for venting the blank mould to atmosphere, said first, second and third valve means being enclosed within a single body, said body having a central chamber, first passage means for connection to a vacuum source, said first valve means connecting said first passage means with said chamber when open, second passage means for connection to a source of counterblow air, said second valve means connecting said second passage means with said chamber when open, third passage means leading to atmosphere, said third valve connecting said third passageway to said chamber when open, and shuttle valve means for directing a supply of pilot fluid pressure to the third valve to close the third valve means when the first valve is opened by said pilot fluid pressure and for directing a supply of pilot fluid pressure to the third valve to close the third valve means when the second valve is opened by said pilot fluid pressure.